baber/WOPTO huggingface dataset:
Patent GB-1447276-A (GB)
Title: Production of calcined ceramic pigments
IPC: C09C1/00
Filed: 1974-01-16
Abstract: 1447276 Zircon-based stain KEELING & WALKER Ltd 13 Dec 1974 [17 Sept 1973 20 Nov 1973 16 Jan 1974] 44039/73 53732/73 and 01962/74 Heading C1M A zircon-based stain is produced by calcining comminuted plasma-dissociated zircon sand together with a colour determining agent and a mineralizer. The zircon sand may be plasma dissociated, using a plasma arc operating at a D.C. energy input of 0À4-2 kWhr./lb. or an A.C. energy input of 0À4-4 kWhr./lb., to form a product at least partially dissociated into SiO 2  and ZrO 2  (preferably 50-98 wt. per cent fully dissociated and 2-35 wt. per cent partially dissociated). The dissociated zircon sand preferably has an average specific gravity of 3À5- 4À0. The dissociated zircon sand may be comminuted before mixing with the other ingredients, or the mixture itself may be comminuted. The comminution may be by wet or dry milling. The zircon sand is preferably milled in the presence of an additive which reacts with the SiO 2  in the dissociated zircon, e.g. caustic soda; caustic potash; hydrofluoric acid; sodium, potassium or ammonium bifluoride; sodium silicate; ammonium fluoride or alkali metal fluoride in the presence of hydrofluoric acid. The colour determining agent may be iron sulphate; iron oxide; praseodymium oxide, oxalate or carbonate; vanadium pentoxide; ammonium metavanadate; sodium ammonium vanadate; or such a vanadium compound together with a phosphate (e.g. trisodium phosphate, sodium monofluorophosphate, trixylyl phosphate, sodium polyphosphate or mixtures thereof). The mineralizer preferably contains red lead and/or lead bisilicate. The dissociated zircon is preferably comminuted to size 150- 350 mesh (British Standard) for use in making zirconium vanadium blue stain, or to size less than 350 mesh for zirconium praseodymium yellow stain. In examples the calcination is at 650-1000‹ C.
Patent GB-872787-A (GB)
Title: Improvements in water aerators
IPC: C02F3/20
Filed: 1958-01-21
Abstract: 872,787. Aerating liquids. AGHNIDES, E. P. Jan. 21, 1958 [Feb. 18, 1957], No. 2018/58. Class 14 (1). An aerator for connection to a water faucet comprises a diaphragm member 14 located in a casing 10 and provided with a plurality of water passageways 15 with restricted entrance openings 17 which may be inclined as shown. The water forced through the openings 17 and passageways 15 are given such turbulence that the streamlets issuing into the main aerator chamber 18 have impaired coherence. Air is induced through inlets 12 and the streamlets pass through a mixing screen 19. Many different embodiments are described in the Specification including some in which a diaphragm member is used in conjunction with another member to form the restricted entrance openings and/or the passageways.
Patent GB-970810-A (GB)
Title: Improvements in magnetic tape drive mechanism
IPC: G11B15/58
Filed: 1963-01-16
Abstract: 970, 810. Automatic control of tape drives. NIPPON ELECTRIC CO. Ltd. Jan. 16, 1963 [Jan. 30, 1962], No. 2046/63. Heading G3R. Magnetic tape loops, whose length depends on the controlled driving of tape-reels, 1, 2 are sensed by photo-electric means 7-11 to derive a signal operating the control motors 30 of mechanical variable speed gears 15 (of the cone-andbelt type) connecting drive motors to the reels 1, 2 so as to maintain the loop-lengths within predetermined limits. An alternative embodiment (not described in detail) substitutes compliance-arm/micro-switch sensing means for the photo-electric system of Fig. 1.
Patent GB-876512-A (GB)
Title: Improvements in or relating to steroids and the manufacture thereof
IPC: C07J75/00
Filed: 1960-01-20
Abstract: The invention comprises an 11a -allylated-11b -hydroxy-5b -pregnane having the formula <FORM:0876512/IV (b)/1> wherein R1 is hydrogen or methyl and R111 is carbonyl oxygen (=O), or a cyclic ketal of the formula <FORM:0876512/IV (b)/2> where n is 1 or 2 and R is hydrogen or a lower alkyl radical containing 1 to 6 carbon atoms, inclusive and a process for the production of an 11a -allylated-11b -hydroxy-5b -3,20-bis (alkylene ketal) which comprises treating a compound represented by the formula:  <FORM:0876512/IV (b)/3> wherein R11 is a keto protecting group and may be a cyclic ketal of the formula <FORM:0876512/IV (b)/4> wherein n and R are as above defined, with an allyl or methallyl metal halide to produce the desired 11a -allylated-11b -hydroxy-5b -pregnane-3.20-bis (alkylene ketal), which can then be treated to remove the protecting group to yield 11a -allylated-11b -hydroxy-5b -pregnane-3,20-dione. Illustrative products of the invention are 11a -allyl-11b -hydroxy-5b -pregnane-3,20-dione, 11a -methallyl-11b -hydroxy-5b -pregnane-3,20-dione and the corresponding 3,20 bis (ethylene ketal).
Patent GB-773094-A (GB)
Title: Automatic tube weighing and classifying machine
Inventor: STEYN GERARD KAROL VAN
IPC: B07C5/28
Filed: 1955-01-25
Abstract: 773,094. Endless conveyers. OWENS-ILLINOIS GLASS CO. Jan. 25, 1955. No. 2178/55. Class 78 (1). [Also in Group XVIII] An endless conveyer, for an apparatus for sorting articles by weight, comprises two parallel chains 18, Fig. 1, driven at a constant speed by a motor M, through a gear-box 25, chains 25a, 27, and a sprocket-wheel 28, the latter being on the same shaft as one of the sprocket-wheels 18a:- 18d of chains 18. The chains carry lugs 30, and the articles, such as glass tubes, are kept clear of the chains by rails 31, 32, 33. At the weighing station W, rail gaps 40, Fig. 3, allow the tubes to fall on to supports 58 for weighing and classification by a unit housed in casing 67 ; whereafter short rail sections 42 are raised to replace the tubes on rails 31. The sections 42 are actuated by a cam 45 which is rotated on a shaft 26 driven by motor M; the cam co-operates with a follower 48 on a spring-loaded arm 47, the movement of the latter being communicated to sections 42 through conventional linkage 50, 51, 53, 54 55, 56, 43, so that a tube is weighed and replaced on rail 31 before the next lug reaches gaps 40, at which time sections 42 are again lowered to allow the succeeding tube to fall on to supports 58. The tubes are discharged to racks 103, Fig. 4, by pairs of fingers 100, the level of discharge depending on the weight classification of the tube in question; normally-retracted fingers 100 are actuated, through linkage 115, 52, 117, 118, by movement of spring-loaded arms 111, having followers 113 cooperating with a series of cams 110 on shaft 26. In operation, fingers 100 are not actuated unless their corresponding arms 111 are released by their respective spring-loaded latches 120, the latter being controlled by solenoids 96; the weighing operation results in one or more electronic tubes conducting to energize one of a series of time delay devices, which in turn energize one of the solenoids 96, when an appropriate time interval has elapsed to allow the weighed tube to reach the correct discharge level.
Patent GB-1035632-A (GB)
Title: Partition means for shelving assemblies
IPC: A47B55/02
Filed: 1964-01-17
Abstract: 1,035,632. Shelving. L. MASLOW. Jan. 17, 1964 [March 1, 1963], No. 2206/64. Heading A4B. [Also in Division E2] In a shelving assembly, vertical partition rods 32 are secured to transverse rods 28 of a grid shelf 24 by means of substantially L-shaped clips 34, each clip comprising a first arm 38 having an arcuate end portion 40 which engages over a shelf rod 28 and an aperture 44 to receive a partition rod 32 and a second arm 36 having an inwardly directed, free end portion 42 which underlies the aperture 44 to bear resiliently on the partition rod 32. Each partition rod 30 is supported by and between clips 34 on two or more superposed shelves 24. The shelves 24 are supported at their ends by a pair of uprights each formed by a pair of vertical rods 16, 18 interconnected by transverse rods 20. The uprights have adjustable feet.
Patent GB-841092-A (GB)
Title: Improvements relating to separators for electric accumulators
Inventor: HONEY ERIC MAURICE O'CONOR
IPC: H01M50/414
Filed: 1958-01-23
Abstract: 841,092. Moulding battery separators. PRITCHETT & GOLD & E.P.S. CO. Ltd. Jan. 7, 1959 [Jan. 23, 1958], No. 2277/58. Class 87(2). Thermoplastic powder, e.g. polyvinyl chloride, for the formation of battery separators is formed on to a travelling belt in a layer with a ribbed pattern by passage beneath a suitably profiled plate which undergoes vertical vibrations by means which do not disturb the belt or compact the powder. Polyvinyl chloride powder is fed from a hopper 4 on to a stainless steel belt 1 which passes beneath adjustable plates 6 and 7 which successively decrease the thickness of the plane powder layer so that on reaching profiled plate 8 the layer is just higher than the tops of rib-forming slots 9, cut out from said plate. The plate 8 is supported by a frame 11, 12 and vibrated vertically through one twentieth of a millimetre at twenty-five cycles per second by a system of eccentrics 10 connected to each end of plate 8 by members 30. The ends of plate 8 move in vertical slots in a block 32 and plates 6 and 7 are fixed in similar slots by screws 13. Plate 8 may alternatively be vibrated by short mechanical taps. The ribbed layer is subsequently heated to sinter the powder, cooled, wetted, dried, and cut up into individual separators, Fig. 2 (not shown).
Patent GB-190655-A (GB)
Title: Improvements in telephone transmitters
IPC: H04R21/02
Filed: 1922-01-26
Abstract: 190,655. Pattison, E. W., (Dictograph Products Corporation). Jan. 26, 1922. Microphones and variable - resistance transmitters. - In a telephone transmitter using a plurality of small carbon balls 14 in pockets an abutment on bars 20 prevents excessive movement of the diaphragm 13. The boss 20 is carried on arms 19 extending frcm a disc-like element 16 which clamps the diaphragm against the edges of a cup 5 in the bottom of the casing 4. To this cup are secured carbon blocks 6 which are insulated from one another and from the cup 5. The leads are attached to contact plates 10 secured between the blocks 6 and their insulating pads. A cap plate 23, provided with openings, screws into the boss 20 and closes the front of the transmitter. The transmitter may be mounted on a hollow handle 1 with connections 2 for a twin cable 3, wires 25 running from the connections 2 to the contact plates of the two carbon blocks, the current passing from one to the other through the carbon balls and the diaphragm.
Patent GB-1050720-A (GB)
IPC: G01V1/37
Filed: 1965-01-19
Abstract: 1,050,720. Geophysical prospecting. CONTINENTAL OIL CO. Jan. 19, 1965 [March 4, 1964], No. 2352/65. Heading H4D. In a method for eliminating from a seismic reflection record the phase distortion caused by the geophone characteristics, a replica of the input signal fed to an electro-mechanical vibrator used for transmitting a seismic disturbance into the earth is phase distorted in a manner which introduces phase distortion similar to that of the geophone, and the phase distorted replica is correlated with the seismic signal from the geophone. In the embodiment of Fig. 2 the vibrator, 22, transmits a swept frequency vibration into the earth under the control of a magnetic recording 42 of the sweep signal. The vibrator 22 is arranged in a phase-controlled feedback loop, as in a known arrangement (Fig. 1, not shown), to compensate for phase distortions introduced by the vibrator 22 and variations in coupling of the vibrator to the earth. Reflected seismic signals are detected by a geophone 30 having amplitude-frequency and phase-frequency characteristics as in Figs. 3 and 4 (not shown) and are recorded by a recording system 32. The swept frequency signal fed to the vibrator 22 is also applied to a geophone simulator 44, comprising the circuit of Fig. 5 or Fig. 6 (neither shown) and having a phase-frequency characteristic similar to that of Fig. 4. The resulting phase-distorted replica is recorded by a system 46. The records from systems 32 and 46 are reproduced by a playback unit 34 and correlated to provide a correlation record 48. The recording systems 32 and 46 and that used in producing the magnetic record 42 may be adjacent recording- playback channels of a multi-channel magnetic tape recorder, the adjacent channels having similar phase characteristics to eliminate phase distortions of the correlation record 48 introduced in the recording and playback processes.
Patent GB-556271-A (GB)
Title: Improvements in means for feeding forward the stock in wire or bar lathes and other machines
IPC: B23B13/12
Filed: 1942-02-24
Abstract: 556,271. Lathe details. WELLINGTON STEEL PRODUCTS, Ltd., and KNIGHT, H. A. Feb. 24, 1942, No. 2391. [Class 83 (iii)] In feeding bar stock in lathes or like machines the stock E is engaged by balls F or by rollers urged against the bar by springs J mounted in inclined holes in a member a which is fed by a weight attached to a cable D. When the collet is opened, the socket a moves forward and causes the balls to grip and feed the work. When the socket has reached the headstock it is moved backwards, the balls then moving away from the work and permitting free movement of the socket. In a modification, Fig. 4, the holes are partly formed in a conical recess in the member a and the balls are replaced by conical ended rollers F<SP>1</SP> having line contact with the work. In another modification, Fig. 5, the holes are of rectangular section with auxiliary grooves which receive the trunnion pins of rollers F<SP>2</SP> arranged tangentially of the work.
Patent GB-1055231-A (GB)
Title: Improvements in or relating to the production of refractory nitride articles
Inventor: WHITE ALBERT EDWARD SUTHERLAND
IPC: C04B35/591
Filed: 1964-01-20
Abstract: A sintered refractory nitride containing a substantial proportion of silicon nitride and/or silicon oxynitride is formed by sintering in a nitrogen containing atmosphere a mixture of SiO2 or SiO2 containing or SiO2 forming material with a metal or metalloid e.g. Al, Ti, Be, Mg, Zr, Ta, Nb, rare earths and B the oxide of which is more stable than SiO2, and the amount of SiO2 present being sufficient to convert most of the metal or metalloid to the corresponding oxide. The SiO2 required may be present as an organo-silicon compound binder e.g. ethyl silicate.  In the examples a mixture of SiC, SiO2, Al and ethyl silicate.  In the examples a mixture of SiC, SiO2, Al and ethyl silicate is fired up to 1450 DEG C. in nitrogen.ALSO:A sintered refractory nitride containing a substantial proportion of silicon nitride and/or silicon oxynitride is formed by sintering in a nitrogen containing atmosphere a mixture of SiO2 or SiO2 containing or SiO2 forming materia with a metal or metalloid, e.g. Al, Ti, Be, Mg, Zr, Ta, Nb, rare earths and B the oxide of which is more stable than SiO2, and the amount of SiO2 present being sufficient to convert most of the metal or metalloid to the corresponding oxide.  The SiO2 required may be present as an organosilicon compound binder, e.g. ethyl silicate.  In the examples a mixture of SiC, SiO2, Al and ethyl silicate is fired up to 1450 DEG  C. in nitrogen.
Patent GB-223788-A (GB)
Title: Improvements in or relating to pneumatic suspensions for vehicles
IPC: B60G17/04
Filed: 1924-01-30
Abstract: 223,788. Dupuy, P. Jan. 30, 1924. Lubricant conveyed by fluid.-In a pneumatic suspension for vehicles, as described in Specification 178,119, oil is circulated through the compressor and suspension devices. At starting, the compressor draws atmospheric air past a valve 50, Fig. 5, and through a pipe 51 to the inlet, and the compressed air is discharged through a connection 54, Fig. 3, into oil chambers 69, the air passing into a vessel 68 through conduits in the removable plug 67, and the oil being forced through branches 55 into the suspension devices, lubricating and sealing them. The air also flows into a pressure tank 72, Fig. 1, supplying the suspension devices. The air pressure in the vessel 68 acts through the oil contained in it on a piston 58 working in a spring-supported cylinder 60, and, when the desired working pressure is reached, forces the cylinder down to close the port 63 leading to the compressor inlet. The oil in the chamber 68 is forced between the piston and cylinder, flows through vents 61 in the cylinder to the compressor inlet pipe, and is circulated through the compressor back to the chambers 69. A reservoir 71 receives the exhaust from the suspensions, and supplies it through a connection 52 to a chamber of the regulator which is provided with a relief valve 50<1> and connected to the compressor inlet. The exhaust of the suspensions is connected through branches 53 with the regulator.
Patent GB-811893-A (GB)
Title: Aldehyde monoperacylates
Inventor: WILLIAMSON JOHN BENTLEY
IPC: C07C409/24
Filed: 1957-01-24
Abstract: The interconversion of the monoperacylate of a C2-6 aliphatic aldehyde and a mixture of the corresponding peracylic acid and aldehyde is effected in the liquid phase at a temperature of from - 50 DEG  to 200 DEG  C., preferably 10 DEG  to 120 DEG  C., in the presence of a basic catalyst.  Suitable catalysts include organic bases such as pyridine, ammonia and the alkali metal and alkaline earth metal salts of weak acids, especially sodium acetate, the latter preferably in a concentration of from 0.005 to 2.0 per cent by weight of the total reaction mixture.  Organic solvents may be used including ketones such as acetone, methyl ethyl ketone and cyclohexanone, esters such as ethyl and n-butyl acetate or organic acids such as acetic.  The reaction may be used either for preparing aldehyde/peracyclic acid mixtures from aldehyde monoperacylates, preferably peracetates or perpropionates, especially acetaldehyde monoperacetate, or for preparing aldehyde monoperacylates from the corresponding acid/aldehyde mixture, preferably comprising peracetic or perpropionic acid with acetaldehyde or propionaldehyde.  The aldehyde monoperacylate or the aldehyde and/or the peracylic acid may be removed from the reaction mixture, preferably continuously, as the reaction proceeds, by any suitable known procedure, such as fractional distillation, solvent extraction or chemically. Alternatively the reaction mixture may itself be used for further reactions without isolating the products, e.g. for the epoxidation of olefines.  The process may be used as part of a purification procedure for other compounds, such as in the removal of aldehyde or peracylic acid from aldehyde oxidates by distillation or extraction to obtain pure monocarboxylic acids.  Examples illustrate the use of cupric and sodium acetates in the conversion of acetaldehyde and peracetic acid in acetic acid solution.  Comparative examples use no catalyst and sulphuric acid catalyst.  The Provisional Specification refers also to the use of acidic catalysts such as acidic salts of metals and organic and inorganic acids stronger than acetic acid, e.g. ferric chloride, formic acid, sulphuric acid and perchloric acid.
Patent GB-121400-A (GB)
Title: Improvements in Salvage Pontoons.
Inventor: INGRAM JAMES OLLIVER
IPC: B63C7/12
Filed: 1918-02-13
Abstract: 121,400. Ingram, J. O., and Ingram, E. C. Feb. 13, 1918. Sunken ships, raising.-Pontoons adapted to be placed in sunken ships to raise the latter comprise a number of inflatable tubes a enclosed in a canvas wrapper o and communicating with each other as by pipes i, means for supplying air to the tubes, and spring or like bracings m, for keeping the tubes in their relative positions. The tubes have rigid convex or concave ends b of metal, reinforced fabric, compressed fibrous material, or leather, and may have inner rubber tubes c; man-holes d facilitate insertion of the inner tubes c &c. A safety-valve g controls the pressure and is arranged on the air-inlet pipe h or on a separate pipe. The hatchways of the ship are closed by spaced pipes.
Patent GB-1448184-A (GB)
Title: Synchronising device particularly for changespeed gears of motor vehicles
IPC: F16D23/06
Filed: 1975-01-21
Abstract: 1448184 Positive clutches HCF PORSCHE AG 21 Jan 1975 [28 March 1974] 2618/75 Heading F2C In a split ring synchronizer for a positive clutch in a gear change mechanism the end 15 and 16 of the split ring 9 are axially displaced relative to one another (by an amount s) and the split ring is prestressed radially. The radial prestress is due to the fitting of the ring 9 in a recess 13 in a clutch body 8 of a gear 2 to be clutched to a shaft 1 by teeth 6 of a gear shift sleeve 5 engaging teeth 7 of the body 8. The axial displacement s may be less than the displacement in the ring 9 before assembly so that the ends 15 and 16 resiliently bias gear 2 and sleeve carrier 3 apart, the gear 2 being resiliently held against a washer 17 to prevent rattle.
Patent GB-1175271-A (GB)
Title: Servo Control Circuit for Electrical Machining Apparatus.
Inventor: LOBUR WALTER
IPC: B23H7/18
Filed: 1967-01-18
Abstract: 1,175,271. Electro-erosion. ELOX CORP. 18 Jan., 1967 [9 March, 1966], No. 2690/67. Heading B3V. [Also in Division G3] Apparatus for electrically machining a conductive workpiece 12 across a dielectric coolant filled gap between a tool electrode 10 and the workpiece comprises a servo feed system 18, 19 which is arranged to provide a rapid approach of electrode 10 towards the workpiece 12 under gap open circuit conditions, and a rapid withdrawal under prolonged short circuit conditions. When the apparatus is operating normally a relay 46 connected across the gap is energized and the gap conditions are sensed by a diode 20 and a capacitor 22 the voltage across which is compared with a reference signal derived from a circuit including a reference source 24, potentiometers 26, 30, 32, 34, 28 with associated diodes 31, 36, 38, 29 and the closed contacts 40 of relay 46; the resulting signal is applied to the servo system 18, 19 whereby the electrode 10 is moved at a normal speed towards or away from the workpiece 12 in a manner such that gap conditions are maintained at an optimum value. The relay 46 is associated with a circuit including a fourlayer device 54, capacitors 44, 52, resistors 48, 50 and a diode 52, the arrangement being such that the device 54 is rendered conductive to shunt relay 46 when open or short-circuit conditions are present in the gap; thus, under these conditions the contacts 40 open to increase the signal to the servo system 18, 19, whereby the speed of operation of the system is increased in the desired manner.
Patent GB-1274931-A (GB)
Title: Lamp seal
Inventor: CLARKE MAURICE GEORGE
IPC: H01J61/36
Filed: 1969-01-16
Abstract: 1,274,931. Ceramic-metal seals. THORN LIGHTING Ltd. 1 Jan., 1970 [16 Jan., 1969], No. 2694/69. Heading B3V. A lead-in wire 5 is sealed in a ceramic lamp envelope 1 by placing pieces of ceramic 3, 4 inside and outside the envelope with a layer 6 of ceramic sealing composition between the pieces 3, 4, heating the composition to melt it and applying pressure to the pieces 3, 4 to squeeze the molten sealing composition into gaps at the peripheries of the envelope and wire 5. Pieces 3, 4 may be of the same material as the envelope 1, e.g. alumina, and the wire 5 may be of niobium, or molybdenum if the lead-through hole is countersunk. The sealing composition may comprise alumina, silica and calcia, or the calcia may be replaced by a mixture of calcia and magnesia, as described in Specification 1,274,932 to which reference is made. Pressure is applied to the sealing washer 6 by pulling on the wire 5 which has a cross-bar 7 bearing on the washer 3. A pair of leads may be sealed in separate holes and the lamp may be filled with sodium.